METHODS OF SYNTHESIS OF CHROMENO[2,3- b ]CHROMENES
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DOI: 10.1007/6067
Abstract: The minireview summarizes published data on the methods of synthesis of chromeno[2,3- b ]chromenes, their benzo analogs, as well as partially hydrogenated and oxidized derivatives. Due to the paucity of methods for the synthesis of… read more here.
Keywords: methods synthesis; synthesis chromeno; chemistry; chromeno chromenes ... See more keywords
Synthesis of symmetrical chromeno[2,3-b]chromenes on the basis of о-quinone methides and 1,1-bis(morpholino)ethene
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DOI: 10.1007/s10593-018-2211-4
Abstract: The reaction of 1,1-bis(morpholino)ethene with precursors of о-quinone methides derived from Mannich bases of phenols and 2-naphthols provided a series of chromeno[2,3-b]chromenes. The cascade process included a hetero-Diels–Alder reaction between о-quinone methide and ketenaminal, elimination… read more here.
Keywords: quinone methides; quinone; morpholino ethene; bis morpholino ... See more keywords
Diastereodivergent synthesis of chromeno[2,3-b]chromenes by tuning all of the reactivity centers of isocyanoacetate.
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DOI: 10.1039/d2cc01632j
Abstract: A novel diastereodivergent tricyclization of isocyanoacetates with o-quinone methides was accomplished for the efficient synthesis of chromeno[2,3-b]chromene derivatives. All three reactive centers of isocyanoacetate reacted sequentially with two o-QMs, affording the products with four adjacent… read more here.
Keywords: synthesis chromeno; centers isocyanoacetate; diastereodivergent synthesis; chromeno chromenes ... See more keywords